Battery management system and electronic device

Abstract

A battery management system and an electronic device are provided. The battery management system includes a master control module, a plurality of selection modules, and N slave control modules. The N slave control modules are coupled in sequence. The slave control module includes an input unit, an output unit and a communication unit. The input unit of the first slave control module is coupled to the master control module, the input unit of the mth slave control module is coupled to the output unit of the (m-1)th slave control module and the master control module through one of the selection modules. The communication units of the N slave control modules are respectively coupled to the master control module.

What is claimed is: 
     
         1 . A battery management system comprising:
 a master control module;   a plurality of selection modules; and   N slave control modules coupled in sequence, wherein the slave control module comprises an input unit, an output unit and a communication unit; wherein the input unit of the first slave control module of the N slave control modules is coupled to the master control module, to receive an addressing enable signal sent by the master control module; the input unit of the mth slave control module is coupled to the output unit of the (m-1)th slave control module and the master control module through one of the selection modules, to receive an addressing enable signal sent by the (m-1)th slave control module or the master control module through the selection module;   the communication units of the N slave control modules are respectively coupled to the master control module;   wherein N and m are integers, N≥2, 2≤m≤N.   
     
     
         2 . The battery management system according to  claim 1 , wherein a first input terminal of the selection module is coupled to the output unit of the (m-1)th slave control module, a second input terminal of the selection module is coupled to the master control module, an output terminal of the selection module is coupled to the input unit of the mth slave control module, and a control terminal of the selection module is coupled to the master control module to receive an addressing mode signal sent by the master control module;
 wherein the selection module is configured to enable, according to the addressing mode signal, the connection between the output unit of the (m-1)th slave control module and the input unit of the mth slave control module, so as to perform automatic addressing of the slave control modules;   or to enable the connection between the master control module and the input unit of the mth slave control module, so as to perform manual addressing of the mth slave control module.   
     
     
         3 . The battery management system according to  claim 2 , wherein the selection module comprises:
 a first logic AND gate, wherein a first input terminal of the first logic AND gate serves as the first input terminal of the selection module;   a second logic AND gate, wherein a first input terminal of the second logic AND gate serves as the second input terminal of the selection module, and a second input terminal of the second logic AND gate serves as the control terminal of the selection module;   a logic NOT gate, wherein an input terminal of the logic NOT gate is coupled to the second input terminal of the second logic AND gate, and an output terminal of the logic NOT gate is coupled to a second input terminal of the first logic AND gate; and   a logic OR gate, wherein a first input terminal of the logic OR gate is coupled to an output terminal of the first logic AND gate, a second input terminal of the logic OR gate is coupled to an output terminal of the second logic AND gate, and an output terminal of the logic OR gate serves as the output terminal of the selection module.   
     
     
         4 . The battery management system according to  claim 2 , wherein the slave control module further comprises a control unit which is respectively coupled to the input unit, the output unit, and the communication unit; wherein the control unit is configured to receive the addressing enable signal through the input unit, receive addressing data through the communication unit, and send the addressing enable signal through the output unit. 
     
     
         5 . The battery management system according to  claim 4 , wherein the output unit comprises:
 a first switch, wherein a first terminal of the first switch is configured to receive a drive signal, and a second terminal of the first switch is coupled to the selection module to output the addressing enable signal to the selection module; and   a second switch, wherein a first terminal of the second switch is coupled to a control terminal of the first switch, a second terminal of the second switch is grounded, and a control terminal of the second switch is coupled to the control unit to receive an enable control signal from the control unit;   wherein the first switch a low level conduction transistor; after the slave control module finishes addressing, the control unit of the slave control module outputs the enable control signal to the control terminal of the second switch to turn on the second switch, thereby lowering the level of control terminal of the first switch to a low level, so as to turn on the first switch, and output the drive signal as an addressing enable signal to the next slave control module.   
     
     
         6 . The battery management system according to  claim 5 , wherein the drive signal is a high-level addressing enable signal received by the input unit of the slave control module from a previous slave control module or the master control module; wherein the output unit further comprises:
 a first resistor coupled to the first terminal of the first switch; wherein the first terminal of the first switch is configured to receive the drive signal through the first resistor;   a second resistor coupled to the control terminal of the first switch; wherein the control terminal of the first switch is configured to receive the drive signal through the second resistor;   a third resistor coupled between the control terminal of the first switch and the first terminal of the second switch;   a fourth resistor coupled between the control unit and the control terminal of the second switch; wherein the control terminal of the second switch is configured to receive the enable control signal through the fourth resistor; and   a fifth resistor coupled to the control terminal of the second switch; wherein the control terminal of the second switch is grounded through the fifth resistor.   
     
     
         7 . The battery management system according to  claim 5 , wherein the drive signal is a high-level addressing enable signal received by the input unit of the slave control module from a previous slave control module or the master control module; wherein the output unit further comprises:
 a sixth resistor coupled to the second terminal of the first switch; wherein the second terminal of the first switch is grounded through the sixth resistor; and   a first capacitor coupled to the second terminal of the first switch; wherein the second terminal of the first switch is also grounded through the first capacitor.   
     
     
         8 . The battery management system according to  claim 4 , wherein the input unit comprises:
 a seventh resistor; and   a third switch, wherein a first terminal of the third switch is coupled to the seventh resistor and receives a power supply voltage signal through the seventh resistor; the control unit is coupled to a connection node between the seventh resistor and the first terminal of the third switch, so as to obtain an addressing trigger signal; a second terminal of the third switch is grounded, and a control terminal of the third switch is coupled to the selection module to receive the addressing enable signal;   wherein when the control terminal of the third switch has received the addressing enable signal, the third switch is turned on to lower the addressing trigger signal to a low level, so as to trigger the control unit  24  to enter a standby status.   
     
     
         9 . The battery management system according to  claim 8 , wherein the input unit further comprises:
 an eighth resistor coupled between the control terminal of the third switch and the selection module; wherein the control terminal of the third switch receives the addressing enable signal through the eighth resistor;   a ninth resistor coupled to the control terminal of the third switch; wherein the control terminal of the third switch is grounded through the ninth resistor;   a second capacitor coupled to the control terminal of the third switch through the eighth resistor; wherein the control terminal of the third switch is also grounded through the eighth resistor and the second capacitor; and   a third capacitor coupled to the first terminal of the third switch; wherein the first terminal of the third switch is grounded through the third capacitor.   
     
     
         10 . An electronic device comprising a battery management and a plurality of battery clusters coupled to the battery management system, wherein the battery management system is configured to monitor parameter information of the plurality of battery clusters, and manage and control statuses of the plurality of battery clusters;
 the battery management system comprising:
 a master control module; 
 a plurality of selection modules; and 
 N slave control modules coupled in sequence, wherein the slave control module comprises an input unit, an output unit and a communication unit; wherein the input unit of the first slave control module of the N slave control modules is coupled to the master control module, to receive an addressing enable signal sent by the master control module; the input unit of the mth slave control module is coupled to the output unit of the (m-1)th slave control module and the master control module through one of the selection modules, to receive an addressing enable signal sent by the (m-1)th slave control module or the master control module through the selection module; the communication units of the N slave control modules are respectively coupled to the master control module; 
 wherein N and m are integers, N≥2, 2≤m≤N. 
   
     
     
         11 . The electronic device according to  claim 10 , wherein a first input terminal of the selection module is coupled to the output unit of the (m-1)th slave control module, a second input terminal of the selection module is coupled to the master control module, an output terminal of the selection module is coupled to the input unit of the mth slave control module, and a control terminal of the selection module is coupled to the master control module to receive an addressing mode signal sent by the master control module;
 wherein the selection module is configured to enable, according to the addressing mode signal, the connection between the output unit of the (m-1)th slave control module and the input unit of the mth slave control module, so as to perform automatic addressing of the slave control modules; or to enable the connection between the master control module and the input unit of the mth slave control module, so as to perform manual addressing of the mth slave control module.   
     
     
         12 . The electronic device according to  claim 11 , wherein the selection module comprises:
 a first logic AND gate, wherein a first input terminal of the first logic AND gate serves as the first input terminal of the selection module;   a second logic AND gate, wherein a first input terminal of the second logic AND gate serves as the second input terminal of the selection module, and a second input terminal of the second logic AND gate serves as the control terminal of the selection module;   a logic NOT gate, wherein an input terminal of the logic NOT gate is coupled to the second input terminal of the second logic AND gate, and an output terminal of the logic NOT gate is coupled to a second input terminal of the first logic AND gate; and   a logic OR gate, wherein a first input terminal of the logic OR gate is coupled to an output terminal of the first logic AND gate, a second input terminal of the logic OR gate is coupled to an output terminal of the second logic AND gate, and an output terminal of the logic OR gate serves as the output terminal of the selection module.   
     
     
         13 . The electronic device according to  claim 11 , wherein the slave control module further comprises a control unit which is respectively coupled to the input unit, the output unit, and the communication unit; wherein the control unit is configured to receive the addressing enable signal through the input unit, receive addressing data through the communication unit, and send the addressing enable signal through the output unit. 
     
     
         14 . The electronic device according to  claim 13 , wherein the output unit comprises:
 a first switch, wherein a first terminal of the first switch is configured to receive a drive signal, and a second terminal of the first switch is coupled to the selection module to output the addressing enable signal to the selection module; and   a second switch, wherein a first terminal of the second switch is coupled to a control terminal of the first switch, a second terminal of the second switch is grounded, and a control terminal of the second switch is coupled to the control unit to receive an enable control signal from the control unit;   wherein the first switch a low level conduction transistor; after the slave control module finishes addressing, the control unit of the slave control module outputs the enable control signal to the control terminal of the second switch to turn on the second switch, thereby lowering the level of control terminal of the first switch to a low level, so as to turn on the first switch, and output the drive signal as an addressing enable signal to the next slave control module.   
     
     
         15 . The electronic device according to  claim 14 , wherein the drive signal is a high-level addressing enable signal received by the input unit of the slave control module from a previous slave control module or the master control module; wherein the output unit further comprises:
 a first resistor coupled to the first terminal of the first switch; wherein the first terminal of the first switch is configured to receive the drive signal through the first resistor;   a second resistor coupled to the control terminal of the first switch; wherein the control terminal of the first switch is configured to receive the drive signal through the second resistor;   a third resistor coupled between the control terminal of the first switch and the first terminal of the second switch;   a fourth resistor coupled between the control unit and the control terminal of the second switch; wherein the control terminal of the second switch is configured to receive the enable control signal through the fourth resistor; and   a fifth resistor coupled to the control terminal of the second switch; wherein the control terminal of the second switch is grounded through the fifth resistor.   
     
     
         16 . The electronic device according to  claim 14 , wherein the output unit further comprises:
 a sixth resistor coupled to the second terminal of the first switch; wherein the second terminal of the first switch is grounded through the sixth resistor; and   a first capacitor coupled to the second terminal of the first switch; wherein the second terminal of the first switch is also grounded through the first capacitor.   
     
     
         17 . The electronic device according to  claim 13 , wherein the input unit comprises:
 a seventh resistor; and   a third switch, wherein a first terminal of the third switch is coupled to the seventh resistor and receives a power supply voltage signal through the seventh resistor; the control unit is coupled to a connection node between the seventh resistor and the first terminal of the third switch, so as to obtain an addressing trigger signal; a second terminal of the third switch is grounded, and a control terminal of the third switch is coupled to the selection module to receive the addressing enable signal;   wherein when the control terminal of the third switch has received the addressing enable signal, the third switch is turned on to lower the addressing trigger signal to a low level, so as to trigger the control unit  24  to enter a standby status.   
     
     
         18 . The electronic device according to  claim 17 , wherein the input unit further comprises:
 an eighth resistor coupled between the control terminal of the third switch and the selection module; wherein the control terminal of the third switch receives the addressing enable signal through the eighth resistor;   a ninth resistor coupled to the control terminal of the third switch; wherein the control terminal of the third switch is grounded through the ninth resistor;   a second capacitor coupled to the control terminal of the third switch through the eighth resistor; wherein the control terminal of the third switch is also grounded through the eighth resistor and the second capacitor; and   a third capacitor coupled to the first terminal of the third switch; wherein the first terminal of the third switch is grounded through the third capacitor.